A joint UK-Japan workshop on the physics and applications of superconductivity was held between 12-15 April 2015 in the picturesque and historic King’s College, Cambridge, UK. The workshop was organised on behalf of the Institute of Physics (IOP) Superconductivity Group, and was funded by the UK’s Engineering and Physical Sciences Research Council (EPSRC), the Daiwa Anglo-Japanese Foundation, King’s College, and the IOP, as well as sponsorship from Sumitomo (SHI) Cryogenics and SuperPower. The team from IOP Conferences also provided significant assistance in organising and running the event.